Locomotive



v 1,456,810 A. MACCHIONI ET AL v LOCDMOTIVE Filed May '24. 1921 Patented May 29, 1923.

UNITED I STATES 1.45am PATENT err-ice.

ACHILLE MACCHIONI AND ENRICO HOCKE, or GENOA, ITAYLYQV Locomo'rivn.

Application filed May 24, 1921. Serial No. 472,304.

To aZZ whom it may concern:

Be'it known that we, AoHILLE MAooHIoNI and ENRIOO Hooxn, both subjects of the King of Italy, both residing at 31, Via XX Settembre, Genoa, Italy, have invented certain-new and useful Improvements in Locomotives, of which the following is a specification.

The present invention relates to improve-' to the driving wheels of the locomotives through the medium of very simple'transmission members.

From among the various types of engines capable of being used we have selected for as the purpose of the present description an engine with horizontal cylinders and opposed pistons i. e., having a single compression chamber. This type of enginein addition to the general advantages of horizontal :0 cylinder engines possesses other advantages which render this type particularly suitable for application to locomotives. Said advantagesinclude the neutralizing of the vibration due to reciprocating masses, the possibility of the further simplification of the drive from the pistons to the wheels and of dispensing with valves and their operating levers.

In the preferred form of engine of this type i. e. with horizontal cylinders and opposed pistons the movements of the pistons are so arranged that the two pistons of one cylinder at the end of their stroke first open the exhaust ports and then the scavenging 5 ports.

The annexed drawing shows diagrammatically by way of example the application to a locomotive of an engine according to the present invention, and also shows particulars of the said engine.

In said drawing Figure 1 represents a diagram in axial longitudinal section of the installation upon the locomotive of a motor provided with three pairs of cylinders.

Figure 2 represents on a larger scale a the central pairs of the cylinders.

vertical section of the separate motor according to Figure l, and exactly on the line C-C of Figures 3 and 4, along the axes of Figures' 3 ands: represent vertical sec. tions on the line A-A, Figure-2, and line B-Bof Figure2. f

For the sake of clearness-we have represented on Figure 1 the pistons 3 and 3 in similar strokepositions, and in Figure 2 the pistons 4 and 4 in analogous positions.

In the drawings, thereference numerals have been placedso as to correspond with the central pairsof the cylinders, but said numerals relate also-to all the other pairs of the cylinders forming part of the motor. the number andv the arrangement of said parts being variable;

As shown in Fig. 1, the two cylinders l and-'2 of the said pair each contain two pistons 3, 3 4", a the former of which 3, 3

are represented as at the inner end of their compression stroke while the latter 4 4 are shown as at the outer end of their stroke (exhaust and scavenging stroke) the move,

ment of the pistons being so arranged on reaching the endof their stroke that the istons 3 4 uncover the exhaust ports 5 rst and then the pistons 3, 4 uncover the scavenging ports 6.

The scavenging ports of the two cylinders 1 and 2 may be connected together by a chamber embracing the two cylinders and.

into which enters the inlet pipe for scavenging air; or the scavenging ports of the one cylinder may be completely separate from those of the other cylinders and may be supplied with scavenging air by two separate pipes or by branch pipes; the same arrangement may be applied to the exhaust ports. 1 Y

In Figures 2, 3 and 4:, we show the exhaust ports 5 of .the upper cylinders of the various pairs in one single chamber and those of the other cylinders in a difierent chamber.

The scavenging ports 6 of the cylinders are ton in the, samev cylinder or to the corresponding. piston of the other. cylinder. by means of a kinematic chain (forming the subject of another invention) in such manner as to obtain opposite movement of the said pistons. The said kinematic or other. chain transmits the movement of the pistons, suitably transformed, to the driving wheels of the locomotive.

Although in the foregoing description only the type of engine illustrated has been described various modifications may nevertheless be made in practice for the solution of the problem and for obtaining other solutions all based however on the fundamental principles of the present invention. Thus for example the axes of the pair of horizontal cylinderscould be arranged in such manner that they do not lie, as shown in the drawing, in one vertical plane. Two or even more pairs of cylinders with horizontal axes could be disposed in any manner in relation to one another. a The arrangement of the scavenging and exhaust ports could also be modified;

Having now particularly described and ascertalned the nature of our said invention 1. A locomotive fitted with an internal combustion engine withhorizontal cylinders characterized by the fact that the engine consists of one or several couples of cylinders; two cylinders of each couple having parallel and distinct axes and each cylinder having two pistons moving in opposite di rections, and by the fact that the pistons placed on the same side of the two cylinders forming a coupleyare connected together by a member, one for each side, the said] n1ember compelling the. pistons to move in opposite directions.

2. A locomotive fitted. with an internal combustion engine. of the type indicated in claim 1, characterized by. the fact that at the end of their course the pistons in each cylinder of a couple are. arranged to open, one the scavengingports, and the other, the exhaust ports; while the, two pistons of the other cylinder of the couple are. at theend of their phase of compression.

In testimony whereofwe our signatures in presence'of two witnesses,

' ACHILLEMACCHIONI. ENRICO HOCKE. Vitnesses:

Vmonn zo. CARBonE, WI LIAM P. Snoonnn. 

